在平地機的液壓傳動中，液壓油在部分元件中還可以起到密封作用，為了保證液壓系統(tǒng)可靠、有效、經(jīng)濟地工作，對于液壓油的質(zhì)量是有所要求的，冷再生機出租人員下面就給大家介紹一下吧。

In the hydraulic transmission of the grader, the hydraulic oil can also play a sealing role in some components. In order to ensure the reliable, effective and economic operation of the hydraulic system, there are requirements for the quality of the hydraulic oil. The taxi staff of the cold regeneration machine will introduce it to you now.

1、良好的粘溫特性。粘溫特性是指油液粘度隨溫度升降而變化的程度，通常用粘度指數(shù)表示。粘度指數(shù)越大，液壓系統(tǒng)中油液粘度隨溫度升高的下降越小，從而保證液壓系統(tǒng)的內(nèi)漏不大。粘度指數(shù)一般不得低于90。

1. Good viscosity temperature characteristics. Viscosity temperature characteristic refers to the degree to which the viscosity of oil changes with temperature rise and fall, usually expressed by viscosity index. The greater the viscosity index is, the smaller the decrease of oil viscosity in the hydraulic system with the increase of temperature, so as to ensure that the internal leakage of the hydraulic system is small. The viscosity index shall not be less than 90.

2、抗剪力安定性好。為改善油液的粘度指數(shù)，油液中往往會加入聚甲基丙烯酯、聚異丁烯等高分子聚合物，這些物質(zhì)分子鏈較長，油液流經(jīng)液壓元件的狹縫時會受到很大的剪切作用，使分子斷鏈，油液粘溫性下降。

2. Good shear stability. In order to improve the viscosity index of the oil, high molecular polymers such as polymethylmethacrylate and polyisobutylene are often added to the oil. These substances have long molecular chains. When the oil flows through the slit of the hydraulic element, it will be subject to great shear, which will break the molecular chains and reduce the viscosity temperature of the oil.

3、較高的化學(xué)反應(yīng)穩(wěn)定性，不易氧化和變質(zhì)。實踐證明，平地機的油溫每升高10℃，其化學(xué)反應(yīng)速度會提高約一倍?？寡趸捕ㄐ院玫囊簤河烷L時間使用不易發(fā)生氧化變質(zhì)，可以保證液壓油的正常循環(huán)。

3. High chemical reaction stability, not easy to oxidize and deteriorate. Practice has proved that the chemical reaction speed of the grader will increase about twice every 10 ℃ increase in the oil temperature of the grader. The hydraulic oil with good oxidation stability is not easy to be oxidized and deteriorated after being used for a long time, which can ensure the normal circulation of hydraulic oil.

4、粘度。粘度代表油液流動時分子間磨擦阻力的大小。粘度過大時，油液流動的阻力大，能量損失大，系統(tǒng)效率就低，同時還會導(dǎo)致主機的空載損失變大，溫升快且工作溫度高，在主泵吸油端易出現(xiàn)“空穴”現(xiàn)象；而粘度過小時則無法保證液壓元件良好的潤滑條件，增加元件的磨損，降低液壓系統(tǒng)的效率。

4. Viscosity. The viscosity represents the friction resistance between molecules when oil flows. When the viscosity is too high, the oil flow resistance is large, the energy loss is large, and the system efficiency is low. At the same time, the no-load loss of the main engine becomes larger, the temperature rises quickly, and the working temperature is high, and the "cavitation" phenomenon is easy to occur at the oil suction end of the main pump; When the viscosity is too small, the good lubrication condition of hydraulic components cannot be guaranteed, the wear of components will be increased, and the efficiency of hydraulic system will be reduced.

5、抗乳化性好，不易產(chǎn)生泡沫。抗乳化性是指油液中混入了水并經(jīng)攪動后不讓水和乳化液從油中分離出來的能力；抗泡沫性是指油液中混入空氣并經(jīng)攪動后不會形成乳狀液和氣泡，進而導(dǎo)致它們從油中分離出來的能力。

5. Good demulsibility, not easy to produce foam. The demulsibility refers to the ability to prevent water and emulsion from separating from oil when water is mixed in the oil and stirred; The anti foam property refers to the ability that the emulsion and bubbles will not form after the oil is mixed with air and stirred, which will lead to their separation from the oil.

以上是關(guān)于平地機液壓油性能的幾點要求，希望可以對您的使用有所幫助。我公司是的機械租賃公司，如果您有需要的話，可以聯(lián)系我們http://www.wlc189.com。

The above are some requirements on the performance of the hydraulic oil of the grader, and I hope they can be helpful to your use. Our company is a professional machinery leasing company. If you need, you can contact us http://www.wlc189.com 。